iOS/Mac: You probably don't have your phone sitting next to you all the time, so it's pretty easy to miss notifications. Notifyr is an app that pushes your iOS notifications over to your Mac so you don't miss them.

Notifyr works over Bluetooth Low Energy and grabs any notifications from any app you get on your iOS device and displays them on your Mac. You can't actually reply to any of these on your Mac, but you'll at least know they're there. Since it uses Bluetooth LE, you'll need a compatible device, which the iPhone 4s and newer phones, and a newer Mac. You can snag the iOS app for a few bucks, but you'll also need the Mac app for it to work.